EEVblog
Автор: EEVblog
Загружено: 2020-07-22
Просмотров: 59942
Repairing a JBL LSR308 studio monitor speaker.
Digital troubleshooting in a speaker? Yep, that's a thing!
How to systematically track down a fault and know that part has failed.
Full 55min video: • EEVblog #1322 - JBL LSR308 Monitor Speaker...
Forum: https://www.eevblog.com/forum/blog/ee...
00:00 - Introduction
01:55 - Inside
04:42 - The chips
07:05 - Voltage checks
07:58 - Safety protection
08:18 - Oscilloscope time
10:29 - ADC checks
11:59 - Signal injection testing
13:08 - Power amp DSP debugging
15:35 - External load checks
19:21 - Suspect identified
20:05 - Rework Desoldering
24:28 - Component replacement soldering
27:01 - Winner Winner Chicken Dinner
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